Air-tube of tires.



J. REES.

AIB TUBE 0F TIRES.

APPLICATION FILED MAR. so 1908.

9 1 ,850. Patented Mar. 2,.1909.

JAMES REES, OF (/ARDIFF, ENGLAND.

AIR-TUBE OF TIRES.

Specification of Letters Patent.

Patented March s, loos.

Application filed Match 30, 1908. Serial No. 424,173.

To all whom it may concern:

Be it known that 1, JAMES Runs, a subject of the King of Great Britain, residing at No. 61 Alfred street, lioath Park, Cardiff, South Vales, England, have invented new and useful Improvements in riir-Tul'ms of Tires, of uhich the following is a Speciiicatiimd This invention relates to improvements in air tubes for pnculnatigv tires, of the type in which the tube instead of being endless is discontinuous, the two ends when in the operative position, being united by a plug and socket joint, the plug element of which is formed by cementing a relatively short length of tubing so as to project from one of the ends of the air tube, the outer end of such projecting length being closed, and the socket element being formed by another short length of tubing contained entirely within the other end of the air tube the inner end of such len th of tubing being closed. llitherto with this type of jointed air tube, the short length of tubing which forms the socket has either been cemented through its entire length within the end of the air tube or, in those cases in which air has had access to the space betfv. eon the tube and the socket for the purpose of lockin the plug and socket to ether, the desire object has been defeated by the pressure on the closed end of the socket causing it to turn inside out thereby effecting disconnection of the joint by the ejection of the plug.

By the present invention the interlocking is promoted by the distorting effect due to the action of means for prevehting the inversion of the socket.

For effecting the above purpose by the present invention, the closed ended socket is cemented within one end of the air tube throughout the entire circumference of its extremity, and at the inner closed end the socket is cemented to the inte'i-ior surface of the air tube at one or more discontinuous places, preferably tv. 0 diametrically opposite places, thereby permitting free access of air to the space between the interior surface of the tube and the exterior surface of the socket.

An air tube constructed according to my invention is illustrated in the accompanying drawing in which:- I

Figure 1 is aside elevation, Fig. 2 is ascotion taken along the line 22 of Fig. 1, and-Figs. 3 and at are longitudinal and transverse sections respectively, showing the joint in the operative position and drawn to a larger scale.

In this drawingr-a is the discontinuous air tube, the plug element of the joint of which projects from f to g, the plug being a short lcn 'th of tubing cemented in the end 9 of the air tube and protecting therefrom terminating in a hemispherical closed end f. The socket element of the joint is formed by a short length of tubing Z1 which is contained within the other end of the air tube a. The socket I) is provided with a hemispherical closed inner end 0, and is cemented at each end of its length within the end of the air tube at d and (2 respectively.

At (Z which is at the mouth it of the end of the air tube, the socket tubing b is cemented throughout its entire .-.ircumference to the interior surface of the air tube, whereas at c it is cemented at two diametrically opposite .places only, so permitting an to iass the joint 0 and have access to the space ctwcen the air tube and socket.

By reference to Figs. 3 and 4, it will be seen that after insertion of the pin into the socket and inflation of the air to e on ttempted withdrawal of the plug from the socket, the walls of the plug and socket will become distorted so as to assume a flattened section owing to the access of air under pressure tothc space between the air tube and the socket and within the plug causin the )lug and socket to cling together and the local attachment of the inner'cnd of the socket to the interior of the air tube locally u nsisting inversion of the socket, such distorouter. end throughout its, entire circumferonce to the interior surface of the air tube and secured at its closed inner end at a pertion only of its circumference to the interior s rface of the air tube.

52. In a discontinuous air tube for tires, a plug" end of uniform diameter provided with 

